Overloaded the build_aggregation_table kernel for the COUNT aggregator to ignore the aggregation input column.
Overloaded the build_aggregation_table kernel for the COUNT aggregator to ignore the aggregation input column.

gpuopenanalytics/libgdf,gpuopenanalytics/libgdf,gpuopenanalytics/libgdf,gpuopenanalytics/libgdf